surfacer
/ˈsɜːrfəsər/Definitions
1. noun
A device or tool used to create a surface or to smooth out a surface, especially in metalworking.
“The engineer used a surfacer to polish the metal before applying the final coat of paint.”
2. verb
To create or form a surface, especially in metalworking.
“The manufacturer surfaced the metal to prepare it for the assembly line.”